It’s a natural progression from planes in books to planes in the air-paper planes, that is. Mr. Simon manages to impart lots of information about the principles of flight and the "hows" and "whys" of airplane design along with his…

It's a natural progression from planes in books to planes in the air-paper planes, that is. Mr. Simon manages to impart lots of information about the principles of flight and the "hows" and "whys" of airplane design along with his experiments.